Study Guide: Chemical, Physical, and Phase Changes Test

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances, often accompanied by signs like color change, gas production, or new smells.

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What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in shape, size, or state.

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What is freezing?

Back

A process where a liquid turns into a solid due to a decrease in temperature.

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What is melting?

Back

A process where a solid turns into a liquid due to an increase in temperature.

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What is evaporation?

Back

The process where a liquid turns into a gas, usually when heat is added.

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What is condensation?

Back

The process where a gas turns into a liquid, usually when heat is removed.

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What is deposition?

Back

The process where a gas changes directly into a solid without becoming a liquid first.

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What is sublimation?

Back

The process where a solid changes directly into a gas without becoming a liquid.

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What are signs of a chemical change?

Back

Signs include change in color, production of gas (bubbles), formation of a precipitate, and change in temperature.

Front

What happens to heat during evaporation?

Back

Heat is gained during evaporation.